A new depsidone, diffractione A （1）, as well as six known phenolic compounds （2-7） were isolated from Usnea diffracta. Their structures were elucidated by 1D and 2D NMR spectroscopy together with HRESIMS analysis....A new depsidone, diffractione A （1）, as well as six known phenolic compounds （2-7） were isolated from Usnea diffracta. Their structures were elucidated by 1D and 2D NMR spectroscopy together with HRESIMS analysis. All components were obtained for the first time from U. diffracta.展开更多
目的建立超高效液相色谱串联三重四级杆飞行时间质谱法(UHPLC-Triple-TOF-MS)快速鉴定松萝中酚酸类有效成分。方法采用Phenomenex Luna 3u C18色谱柱(150 mm×2.0 mm,3μm),流动相为甲醇(0.05%甲酸)-水(0.05%甲酸-4 mmol乙酸铵),梯...目的建立超高效液相色谱串联三重四级杆飞行时间质谱法(UHPLC-Triple-TOF-MS)快速鉴定松萝中酚酸类有效成分。方法采用Phenomenex Luna 3u C18色谱柱(150 mm×2.0 mm,3μm),流动相为甲醇(0.05%甲酸)-水(0.05%甲酸-4 mmol乙酸铵),梯度洗脱,体积流量0.3 m L/min,柱温30℃。采用电喷雾离子源负离子模式,全扫描模式采集样品数据,根据高分辨数据并结合二级质谱信息快速鉴定松萝中酚酸类有效成分,诸如地弗地衣酸、松萝酸、苔色酸等。结果鉴定出松萝中17种酚酸类有效成分,主要包括缩酚酸类、二苯骈呋喃类、多取代单苯环类化合物,并对其初步裂解规律进行总结。结论通过UHPLC-Triple-TOF-MS联用技术,为鉴定松萝的化学成分提供了一种快速、高效的定性分析方法。展开更多
基金supported by the National 863 Program of China(No.2007AA09Z403)National Key Technology Research and Development Program of China(No.2007BAI37B05)Natural Science Foundation of Gansu Province(No.0710RJZA120).
文摘A new depsidone, diffractione A （1）, as well as six known phenolic compounds （2-7） were isolated from Usnea diffracta. Their structures were elucidated by 1D and 2D NMR spectroscopy together with HRESIMS analysis. All components were obtained for the first time from U. diffracta.
文摘目的建立超高效液相色谱串联三重四级杆飞行时间质谱法(UHPLC-Triple-TOF-MS)快速鉴定松萝中酚酸类有效成分。方法采用Phenomenex Luna 3u C18色谱柱(150 mm×2.0 mm,3μm),流动相为甲醇(0.05%甲酸)-水(0.05%甲酸-4 mmol乙酸铵),梯度洗脱,体积流量0.3 m L/min,柱温30℃。采用电喷雾离子源负离子模式,全扫描模式采集样品数据,根据高分辨数据并结合二级质谱信息快速鉴定松萝中酚酸类有效成分,诸如地弗地衣酸、松萝酸、苔色酸等。结果鉴定出松萝中17种酚酸类有效成分,主要包括缩酚酸类、二苯骈呋喃类、多取代单苯环类化合物,并对其初步裂解规律进行总结。结论通过UHPLC-Triple-TOF-MS联用技术,为鉴定松萝的化学成分提供了一种快速、高效的定性分析方法。
